linux/drivers/atm/zatm.h
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   1/* drivers/atm/zatm.h - ZeitNet ZN122x device driver declarations */
   2
   3/* Written 1995-1998 by Werner Almesberger, EPFL LRC/ICA */
   4
   5
   6#ifndef DRIVER_ATM_ZATM_H
   7#define DRIVER_ATM_ZATM_H
   8
   9#include <linux/skbuff.h>
  10#include <linux/atm.h>
  11#include <linux/atmdev.h>
  12#include <linux/sonet.h>
  13#include <linux/pci.h>
  14
  15
  16#define DEV_LABEL       "zatm"
  17
  18#define MAX_AAL5_PDU    10240   /* allocate for AAL5 PDUs of this size */
  19#define MAX_RX_SIZE_LD  14      /* ceil(log2((MAX_AAL5_PDU+47)/48)) */
  20
  21#define LOW_MARK        12      /* start adding new buffers if less than 12 */
  22#define HIGH_MARK       30      /* stop adding buffers after reaching 30 */
  23#define OFF_CNG_THRES   5       /* threshold for offset changes */
  24
  25#define RX_SIZE         2       /* RX lookup entry size (in bytes) */
  26#define NR_POOLS        32      /* number of free buffer pointers */
  27#define POOL_SIZE       8       /* buffer entry size (in bytes) */
  28#define NR_SHAPERS      16      /* number of shapers */
  29#define SHAPER_SIZE     4       /* shaper entry size (in bytes) */
  30#define VC_SIZE         32      /* VC dsc (TX or RX) size (in bytes) */
  31
  32#define RING_ENTRIES    32      /* ring entries (without back pointer) */
  33#define RING_WORDS      4       /* ring element size */
  34#define RING_SIZE       (sizeof(unsigned long)*(RING_ENTRIES+1)*RING_WORDS)
  35
  36#define NR_MBX          4       /* four mailboxes */
  37#define MBX_RX_0        0       /* mailbox indices */
  38#define MBX_RX_1        1
  39#define MBX_TX_0        2
  40#define MBX_TX_1        3
  41
  42struct zatm_vcc {
  43        /*-------------------------------- RX part */
  44        int rx_chan;                    /* RX channel, 0 if none */
  45        int pool;                       /* free buffer pool */
  46        /*-------------------------------- TX part */
  47        int tx_chan;                    /* TX channel, 0 if none */
  48        int shaper;                     /* shaper, <0 if none */
  49        struct sk_buff_head tx_queue;   /* list of buffers in transit */
  50        wait_queue_head_t tx_wait;      /* for close */
  51        u32 *ring;                      /* transmit ring */
  52        int ring_curr;                  /* current write position */
  53        int txing;                      /* number of transmits in progress */
  54        struct sk_buff_head backlog;    /* list of buffers waiting for ring */
  55};
  56
  57struct zatm_dev {
  58        /*-------------------------------- TX part */
  59        int tx_bw;                      /* remaining bandwidth */
  60        u32 free_shapers;               /* bit set */
  61        int ubr;                        /* UBR shaper; -1 if none */
  62        int ubr_ref_cnt;                /* number of VCs using UBR shaper */
  63        /*-------------------------------- RX part */
  64        int pool_ref[NR_POOLS];         /* free buffer pool usage counters */
  65        volatile struct sk_buff *last_free[NR_POOLS];
  66                                        /* last entry in respective pool */
  67        struct sk_buff_head pool[NR_POOLS];/* free buffer pools */
  68        struct zatm_pool_info pool_info[NR_POOLS]; /* pool information */
  69        /*-------------------------------- maps */
  70        struct atm_vcc **tx_map;        /* TX VCCs */
  71        struct atm_vcc **rx_map;        /* RX VCCs */
  72        int chans;                      /* map size, must be 2^n */
  73        /*-------------------------------- mailboxes */
  74        unsigned long mbx_start[NR_MBX];/* start addresses */
  75        dma_addr_t mbx_dma[NR_MBX];
  76        u16 mbx_end[NR_MBX];            /* end offset (in bytes) */
  77        /*-------------------------------- other pointers */
  78        u32 pool_base;                  /* Free buffer pool dsc (word addr) */
  79        /*-------------------------------- ZATM links */
  80        struct atm_dev *more;           /* other ZATM devices */
  81        /*-------------------------------- general information */
  82        int mem;                        /* RAM on board (in bytes) */
  83        int khz;                        /* timer clock */
  84        int copper;                     /* PHY type */
  85        unsigned char irq;              /* IRQ */
  86        unsigned int base;              /* IO base address */
  87        struct pci_dev *pci_dev;        /* PCI stuff */
  88        spinlock_t lock;
  89};
  90
  91
  92#define ZATM_DEV(d) ((struct zatm_dev *) (d)->dev_data)
  93#define ZATM_VCC(d) ((struct zatm_vcc *) (d)->dev_data)
  94
  95
  96struct zatm_skb_prv {
  97        struct atm_skb_data _;          /* reserved */
  98        u32 *dsc;                       /* pointer to skb's descriptor */
  99};
 100
 101#define ZATM_PRV_DSC(skb) (((struct zatm_skb_prv *) (skb)->cb)->dsc)
 102
 103#endif
 104
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